appurtenant vs adjuvant

appurtenant is not a noun while adjuvant is a noun.

Word	Noun	Adjective	Verb	Adverb
appurtenant	No	Yes	No	No
adjuvant	Yes	Yes	No	No

As adjectives, appurtenant and adjuvant are synonyms defined as:

Other synonyms of appurtenant include accessory, adjunct, ancillary, auxiliary.

appurtenant (noun)	adjuvant (noun)
	an additive that enhances the effectiveness of medical treatment

appurtenant (adjective)	adjuvant (adjective)
furnishing added support	enhancing the action of a medical treatment
	furnishing added support